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regmove.c (discover_flags_reg): Remove cc0 code.

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* regmove.c (discover_flags_reg): Remove cc0 code.
        (mark_flags_life_zones) [HAVE_cc0]: Force use of cc0; bail if
        a potential flags register was identified.

From-SVN: r25341
This commit is contained in:
Richard Henderson 1999-02-21 05:16:11 -08:00 committed by Richard Henderson
parent 3f860e2bcd
commit e7f5b971ec
2 changed files with 14 additions and 5 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Sun Feb 21 13:15:40 1999 Richard Henderson <rth@cygnus.com>
* regmove.c (discover_flags_reg): Remove cc0 code.
(mark_flags_life_zones) [HAVE_cc0]: Force use of cc0; bail if
a potential flags register was identified.
Sat Feb 20 16:16:07 1998 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
* rs6000.md (scc plus ltu): Fix typo in last change.

13
gcc/regmove.c
View File

@ -193,12 +193,7 @@ discover_flags_reg ()
return pc_rtx;
found = (GET_CODE (tmp) == REG && REGNO (tmp) < FIRST_PSEUDO_REGISTER);
#ifdef HAVE_cc0
/* If we're cc0, and we found a potential flags reg, bail. */
return (found ? pc_rtx : cc0_rtx);
#else
return (found ? tmp : NULL_RTX);
#endif
}
return pc_rtx;
@ -228,6 +223,14 @@ mark_flags_life_zones (flags)
int flags_nregs;
int block;
#ifdef HAVE_cc0
/* If we found a flags register on a cc0 host, bail. */
if (flags == NULL_RTX)
flags = cc0_rtx;
else if (flags != cc0_rtx)
flags = pc_rtx;
#endif
/* Simple cases first: if no flags, clear all modes. If confusing,
mark the entire function as being in a flags shadow. */
if (flags == NULL_RTX || flags == pc_rtx)